Dual manometer



April 29, 1952 J. v. HobsHlRE DUAL MANOMETER Filed March 1s. 194e INVENTOR. James V Hoda/zz're ATTE! R N EYS L. il.:

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Patented Apr. 29, 1952 UNITED STATES ATENT OFFICE Z Claims. 1

'This invention relates to a dual manometer.

It is an object of the present invention to provide two manometers on a single support and a common valve stem extending between the branches of the manometers for permitting the same to being closed as whenthe manometer is to be transported, the valve stem being in a head from which the branches oi the manometer tubes extend and to which test connections can be tted.

Other objects of the present invention are to provide a dual manometer which is of simple con struction, inexpensive to manufacture, convenient to use and connect with portions of apparatus to be measured for pressure or vacuum, has minimum parts and eiilcient in operation.

For other objects and for a better understandingof the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing, in which Fig. l is a iront elevational view of the manometer embodying the features of the present invention.

Fig. 2 is a side elevational view.

Fig. 3 is an enlarged fragmentary elevational view with portions broken away and shown in section.

Figs. 4 and 5 are respectively transverse sectional views taken on lines i-i and 5--5 of Fig. 3.

Referring now to the figures, i9 represents a support formed of plastic or other material on the upper end of which there is disposed an enlargement II into which extends a valve stem I2 of tapered formation. Extending vertically through the enlargement H are a plurality of Vertical passages I3 having large end sections I4 and I5. The end sections I4 of the passages receive the upper ends of U-shaped tubes I6 and I7., The tube I 'I lies within the U-shaped tube 'I6 and between its vertical portions there extends a measuring scale I S on which pressure readings can be made. Test connections can be made with the threaded sections I5. The valve stem I2 is extended through a transverse opening I9 which traverses the vertical passages I3. The valve stem has holes 2| adapted to be aligned with the passages I3 or to be turned out of alignment therewith as the valve stem is turned to a closed position. Within the stem I2 and extending diametrically thereacross is a hole 24 into which can be extended a turning handle. The tubes I6 and Il are fitted tightly within the large sections I4 of the passages I3 so as to be suspended therefrom free of outer means of support upon the supporting board I9. The supporting board I has a flange 26 extending around it to give protection to the tubes I and I'I.

The manometer parts are preferably made of p astic, but where temperatures are high, the same may be constructed of aluminum and with the tubes formed of glass. Mercury may be carried in the tube i6 while in the tube Il there can be carried the water.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope oi the present invention as defined by the appended claims.

I claim:

l. In a dual manometer, a support provided with an enlargement on its upper end, inner and outer U-shaped manometer tubes having their upper ends extending into said enlargement, there being spaced parallel vertical passages extending through said enlargement and communicating with the ends of the manometer tubes, there being a transverse opening traversing the vertically extending passages, a tapered valve stem rotatably positioned in said transverse opening and having openings therein adapted to be aligned with the vertical passages, and a measuring scale portion extending longitudinally of the support and positioned between the vertically extending portion of the inner tube.

2. In a dual manometer, a support provided with an enlargement on its upper end, a pair of U-shaped manometer tubes having their upper ends extending into said enlargement, there being spaced parallel vertical passages extending through said enlargement and communicating with the ends of the manometer tubes, there being a transverse openingI traversing the vertically extending passages, a tapered valve stem rotatably positioned in said transverse opening and having openings therein adapted to be aligned with the vertical passages, and a measuring scale portion extending longitudinally of th-e support and positioned between the vertically extending portion of the innermost tube, one of said tubes being nested within the other of said tubes, and a liange projecting from said support for protecting said tubes.

JAMES V. HODSHIRE.

REFERENCES CITED The following references are of record in the file of this patent: l

UNITED STATES PATENTS Number Name Date 1,640,926 Beachler Aug. 30, 1927 1,812,152 Jensen June 30, 1931 1,909,296 Meriam May 16, 1933 2,323,556 Mattocks July 6, 1943 

